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<div class="title">qwt_polar_fitter.cpp</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/******************************************************************************</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * QwtPolar Widget Library</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * Copyright (C) 2008   Uwe Rathmann</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * This library is free software; you can redistribute it and/or</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> *****************************************************************************/</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160; </div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="preprocessor">#include &quot;qwt_polar_fitter.h&quot;</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#include &lt;qpolygon.h&gt;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor">#include &lt;qpainterpath.h&gt;</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160; </div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="keyword">class </span>QwtPolarFitter::PrivateData</div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;{</div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;  <span class="keyword">public</span>:</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;    PrivateData()</div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;        : <a class="code" href="class_qwt_polar_fitter.html#a181f2ad00cb7e8e23ff91e78cedc4ea0">stepCount</a>( 5 )</div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;    {</div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;    }</div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160; </div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;    <span class="keywordtype">int</span> <a class="code" href="class_qwt_polar_fitter.html#a181f2ad00cb7e8e23ff91e78cedc4ea0">stepCount</a>;</div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;};</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160; </div>
<div class="line"><a name="l00030"></a><span class="lineno"><a class="line" href="class_qwt_polar_fitter.html#a88d0ab40691bab03bd52399bce35f46b">   30</a></span>&#160;<a class="code" href="class_qwt_polar_fitter.html#a88d0ab40691bab03bd52399bce35f46b">QwtPolarFitter::QwtPolarFitter</a>( <span class="keywordtype">int</span> stepCount )</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;    : <a class="code" href="class_qwt_curve_fitter.html">QwtCurveFitter</a>( <a class="code" href="class_qwt_polar_fitter.html">QwtPolarFitter</a>::Polygon )</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;{</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;    m_data = <span class="keyword">new</span> PrivateData;</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;    m_data-&gt;stepCount = <a class="code" href="class_qwt_polar_fitter.html#a181f2ad00cb7e8e23ff91e78cedc4ea0">stepCount</a>;</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;}</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160; </div>
<div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="class_qwt_polar_fitter.html#af44b4b5f62393add4ea35b11b6723c12">   38</a></span>&#160;<a class="code" href="class_qwt_polar_fitter.html#af44b4b5f62393add4ea35b11b6723c12">QwtPolarFitter::~QwtPolarFitter</a>()</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;{</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;    <span class="keyword">delete</span> m_data;</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;}</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160; </div>
<div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="class_qwt_polar_fitter.html#a3250f0d3fe6e7a658ce46920fe7efcab">   51</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="class_qwt_polar_fitter.html#a3250f0d3fe6e7a658ce46920fe7efcab">QwtPolarFitter::setStepCount</a>( <span class="keywordtype">int</span> stepCount )</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;{</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    m_data-&gt;stepCount = qMax( <a class="code" href="class_qwt_polar_fitter.html#a181f2ad00cb7e8e23ff91e78cedc4ea0">stepCount</a>, 0 );</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;}</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160; </div>
<div class="line"><a name="l00060"></a><span class="lineno"><a class="line" href="class_qwt_polar_fitter.html#a181f2ad00cb7e8e23ff91e78cedc4ea0">   60</a></span>&#160;<span class="keywordtype">int</span> <a class="code" href="class_qwt_polar_fitter.html#a181f2ad00cb7e8e23ff91e78cedc4ea0">QwtPolarFitter::stepCount</a>()<span class="keyword"> const</span></div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    <span class="keywordflow">return</span> m_data-&gt;stepCount;</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;}</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160; </div>
<div class="line"><a name="l00072"></a><span class="lineno"><a class="line" href="class_qwt_polar_fitter.html#a99fda3a39854c5d9f2f77b66a05ef295">   72</a></span>&#160;QPolygonF <a class="code" href="class_qwt_polar_fitter.html#a99fda3a39854c5d9f2f77b66a05ef295">QwtPolarFitter::fitCurve</a>( <span class="keyword">const</span> QPolygonF&amp; points )<span class="keyword"> const</span></div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    <span class="keywordflow">if</span> ( m_data-&gt;stepCount &lt;= 0 || points.size() &lt;= 1 )</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;        <span class="keywordflow">return</span> points;</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160; </div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;    QPolygonF fittedPoints;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160; </div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;    <span class="keywordtype">int</span> numPoints = points.size() + ( points.size() - 1 ) * m_data-&gt;stepCount;</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160; </div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;    fittedPoints.resize( numPoints );</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160; </div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    <span class="keywordtype">int</span> index = 0;</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    fittedPoints[index++] = points[0];</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;    <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 1; i &lt; points.size(); i++ )</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;    {</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;        <span class="keyword">const</span> QPointF&amp; p1 = points[i - 1];</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;        <span class="keyword">const</span> QPointF&amp; p2 = points[i];</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160; </div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;        <span class="keyword">const</span> <span class="keywordtype">double</span> dx = ( p2.x() - p1.x() ) / m_data-&gt;stepCount;</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;        <span class="keyword">const</span> <span class="keywordtype">double</span> dy = ( p2.y() - p1.y() ) / m_data-&gt;stepCount;</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;        for ( <span class="keywordtype">int</span> j = 1; j &lt;= m_data-&gt;stepCount; j++ )</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;        {</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">double</span> x = p1.x() + j * dx;</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">double</span> y = p1.y() + j * dy;</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160; </div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;            fittedPoints[index++] = QPointF( x, y );</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;        }</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;    }</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    fittedPoints.resize( index );</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160; </div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;    <span class="keywordflow">return</span> fittedPoints;</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;}</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160; </div>
<div class="line"><a name="l00110"></a><span class="lineno"><a class="line" href="class_qwt_polar_fitter.html#a851d043e4787663297a489593d33841f">  110</a></span>&#160;QPainterPath <a class="code" href="class_qwt_polar_fitter.html#a851d043e4787663297a489593d33841f">QwtPolarFitter::fitCurvePath</a>( <span class="keyword">const</span> QPolygonF&amp; points )<span class="keyword"> const</span></div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;    QPainterPath path;</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;    path.addPolygon( <a class="code" href="class_qwt_polar_fitter.html#a99fda3a39854c5d9f2f77b66a05ef295">fitCurve</a>( points ) );</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;    <span class="keywordflow">return</span> path;</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;}</div>
<div class="ttc" id="aclass_qwt_curve_fitter_html"><div class="ttname"><a href="class_qwt_curve_fitter.html">QwtCurveFitter</a></div><div class="ttdoc">Abstract base class for a curve fitter.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__curve__fitter_8h_source.html#l00021">qwt_curve_fitter.h:22</a></div></div>
<div class="ttc" id="aclass_qwt_polar_fitter_html"><div class="ttname"><a href="class_qwt_polar_fitter.html">QwtPolarFitter</a></div><div class="ttdoc">A simple curve fitter for polar points.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__polar__fitter_8h_source.html#l00024">qwt_polar_fitter.h:25</a></div></div>
<div class="ttc" id="aclass_qwt_polar_fitter_html_a181f2ad00cb7e8e23ff91e78cedc4ea0"><div class="ttname"><a href="class_qwt_polar_fitter.html#a181f2ad00cb7e8e23ff91e78cedc4ea0">QwtPolarFitter::stepCount</a></div><div class="ttdeci">int stepCount() const</div><div class="ttdef"><b>Definition:</b> <a href="qwt__polar__fitter_8cpp_source.html#l00060">qwt_polar_fitter.cpp:60</a></div></div>
<div class="ttc" id="aclass_qwt_polar_fitter_html_a3250f0d3fe6e7a658ce46920fe7efcab"><div class="ttname"><a href="class_qwt_polar_fitter.html#a3250f0d3fe6e7a658ce46920fe7efcab">QwtPolarFitter::setStepCount</a></div><div class="ttdeci">void setStepCount(int size)</div><div class="ttdef"><b>Definition:</b> <a href="qwt__polar__fitter_8cpp_source.html#l00051">qwt_polar_fitter.cpp:51</a></div></div>
<div class="ttc" id="aclass_qwt_polar_fitter_html_a851d043e4787663297a489593d33841f"><div class="ttname"><a href="class_qwt_polar_fitter.html#a851d043e4787663297a489593d33841f">QwtPolarFitter::fitCurvePath</a></div><div class="ttdeci">virtual QPainterPath fitCurvePath(const QPolygonF &amp;) const override</div><div class="ttdef"><b>Definition:</b> <a href="qwt__polar__fitter_8cpp_source.html#l00110">qwt_polar_fitter.cpp:110</a></div></div>
<div class="ttc" id="aclass_qwt_polar_fitter_html_a88d0ab40691bab03bd52399bce35f46b"><div class="ttname"><a href="class_qwt_polar_fitter.html#a88d0ab40691bab03bd52399bce35f46b">QwtPolarFitter::QwtPolarFitter</a></div><div class="ttdeci">QwtPolarFitter(int stepCount=5)</div><div class="ttdef"><b>Definition:</b> <a href="qwt__polar__fitter_8cpp_source.html#l00030">qwt_polar_fitter.cpp:30</a></div></div>
<div class="ttc" id="aclass_qwt_polar_fitter_html_a99fda3a39854c5d9f2f77b66a05ef295"><div class="ttname"><a href="class_qwt_polar_fitter.html#a99fda3a39854c5d9f2f77b66a05ef295">QwtPolarFitter::fitCurve</a></div><div class="ttdeci">virtual QPolygonF fitCurve(const QPolygonF &amp;) const override</div><div class="ttdef"><b>Definition:</b> <a href="qwt__polar__fitter_8cpp_source.html#l00072">qwt_polar_fitter.cpp:72</a></div></div>
<div class="ttc" id="aclass_qwt_polar_fitter_html_af44b4b5f62393add4ea35b11b6723c12"><div class="ttname"><a href="class_qwt_polar_fitter.html#af44b4b5f62393add4ea35b11b6723c12">QwtPolarFitter::~QwtPolarFitter</a></div><div class="ttdeci">virtual ~QwtPolarFitter()</div><div class="ttdoc">Destructor.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__polar__fitter_8cpp_source.html#l00038">qwt_polar_fitter.cpp:38</a></div></div>
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